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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * The Universal Permissive License (UPL), Version 1.0
 *
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 * (a) the Software, and
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 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
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package org.graalvm.nativebridge.benchmark;

import org.graalvm.jniutils.NativeBridgeSupport;

final class NativeBridgeSupportImpl implements NativeBridgeSupport {

    private static final String TRACE_LEVEL_ENV_NAME = "NATIVEBRIDGE_BENCH_TRACE_LEVEL";

    private volatile Integer traceLevel;

    @Override
    public String getFeatureName() {
        return "BENCH";
    }

    @Override
    public boolean isTracingEnabled(int level) {
        return traceLevel() >= level;
    }

    @Override
    public void trace(String message) {
        System.err.printf("[%s] %s%n", getFeatureName(), message);
    }

    private int traceLevel() {
        if (traceLevel == null) {
            String var = System.getenv(TRACE_LEVEL_ENV_NAME);
            if (var != null) {
                try {
                    traceLevel = Integer.parseInt(var);
                } catch (NumberFormatException e) {
                    System.err.printf("Invalid value for %s: %s%n", TRACE_LEVEL_ENV_NAME, e);
                    traceLevel = 0;
                }
            } else {
                traceLevel = 0;
            }
        }
        return traceLevel;
    }
}
